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Showing 1–24 of 1,497 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Nutritional Deficiency Clear all
Recruiting No phase listed Observational Accepts healthy volunteers

Brain Metabolism Observed at 3 Tesla or 7 Tesla in Health and Metabolic Disease

NCT05085704
View directory record Official record
Conditions
Glut1 Deficiency Syndrome 1, Glucose Metabolism Disorders, Epilepsy, Glut1 Deficiency Syndrome 1, Autosomal Recessive, Glucose Transporter Type 1 Deficiency Syndrome, Glucose Transporter Protein Type 1 Deficiency Syndrome, Glucose Transport Defect
Interventions
Magnetic resonance imaging
Device
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
16 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2029
U.S. locations
2
States / cities
New York, New York • Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 31, 2026 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Phase 1Phase 2 Interventional

The Effect of Oral Niacinamide on Plasma Phosphorus Levels in Peritoneal Dialysis Patients

NCT00508885
View directory record Official record
Conditions
Hyperphosphatemia
Interventions
Niacinamide, Placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
17 participants
Timeline
2006 – 2007
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 29, 2007 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Not applicable Interventional

The Produce Drop: Using Food as Medicine to Lower A1C Levels and Blood Pressure

NCT04421755
View directory record Official record
Conditions
Diabetes, Hypertension, Nutrition Poor
Interventions
Produce delivery, Cooking classes
Other
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 64 Years
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Tulsa, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jan 9, 2023 · Synced Jul 21, 2026, 1:31 PM EDT
Terminated Phase 2 Interventional Results available

N-Acetyl-L-Leucine for Ataxia-Telangiectasia (A-T)

NCT03759678
View directory record Official record
Conditions
Ataxia Telangiectasia
Interventions
IB1001
Drug
Lead sponsor
IntraBio Inc
Industry
Eligibility
6 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Jul 21, 2026, 1:31 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Environmental Influences on Vitamin D Status

NCT00780247
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Not listed
Lead sponsor
Creighton University
Other
Eligibility
18 Years to 60 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Anchorage, Alaska
Source: ClinicalTrials.gov public record
Updated Oct 26, 2008 · Synced Jul 21, 2026, 1:31 PM EDT
Terminated Phase 2 Interventional Results available

Study of Human Plasma-Derived Alpha1-Proteinase Inhibitor in Subjects With New-Onset Type 1 Diabetes Mellitus

NCT02093221
View directory record Official record
Conditions
Type 1 Diabetes Mellitus
Interventions
180 mg/kg Alpha1-PI, 90 mg/kg Alpha1-PI, Placebo
Biological
Lead sponsor
Grifols Therapeutics LLC
Industry
Eligibility
6 Years to 35 Years
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
36
States / cities
Tucson, Arizona • Los Angeles, California • Orange, California + 28 more
Source: ClinicalTrials.gov public record
Updated Sep 4, 2018 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Not applicable Interventional Results available

The Effect of Hypovitaminosis D and Vitamin D Supplementation on Fracture Nonunion Rates

NCT01691833
View directory record Official record
Conditions
Hypovitaminosis D
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
113 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
Charlotte, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 13, 2022 · Synced Jul 21, 2026, 1:31 PM EDT
No Longer Available No phase listed Expanded access

Compassionate Use of Triheptanoin (C7) for Inherited Disorders of Energy Metabolism

NCT01461304
View directory record Official record
Conditions
Very Long-chain acylCoA Dehydrogenase (VLCAD) Deficiency, Carnitine Palmitoyltransferase Deficiencies (CPT1, CPT2), Mitochondrial Trifunctional Protein Deficiency, Long-chain Hydroxyacyl-CoA Dehydrogenase Deficiency, Glycogen Storage Disorders, Pyruvate Carboxylase Deficiency Disease, ACYL-CoA DEHYDROGENASE FAMILY, MEMBER 9, DEFICIENCY of, Barth Syndrome
Interventions
triheptanoin
Drug
Lead sponsor
Jerry Vockley, MD, PhD
Other
Eligibility
1 Month and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 9, 2021 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Not applicable Interventional

Study of Lifestyle Modification in HIV Lipodystrophy

NCT00111358
View directory record Official record
Conditions
HIV, Metabolic Diseases
Interventions
Lifestyle Modification, No lifestyle modification
Behavioral · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 17, 2011 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Phase 1 Interventional

Low-Dose Total-Body Irradiation and Fludarabine Phosphate Followed by Unrelated Donor Stem Cell Transplant in Treating Patients With Fanconi Anemia

NCT00093743
View directory record Official record
Conditions
Adult Acute Myeloid Leukemia in Remission, Adult Acute Myeloid Leukemia With 11q23 (MLL) Abnormalities, Adult Acute Myeloid Leukemia With Del(5q), Adult Acute Myeloid Leukemia With Inv(16)(p13;q22), Adult Acute Myeloid Leukemia With t(15;17)(q22;q12), Adult Acute Myeloid Leukemia With t(16;16)(p13;q22), Adult Acute Myeloid Leukemia With t(8;21)(q22;q22), Childhood Acute Myeloid Leukemia in Remission, Childhood Myelodysplastic Syndromes, Fanconi Anemia, Previously Treated Myelodysplastic Syndromes
Interventions
fludarabine phosphate, cyclosporine, total-body irradiation, allogeneic bone marrow transplantation, allogeneic hematopoietic stem cell transplantation, peripheral blood stem cell transplantation, mycophenolate mofetil
Drug · Radiation · Procedure
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
Not listed
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2000
U.S. locations
5
States / cities
Chicago, Illinois • Indianapolis, Indiana • Nashville, Tennessee + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 19, 2017 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Not applicable Interventional

An Open Label Evaluation of the Safety and Pharmacokinetics of Ganciclovir in Children

NCT00002015
View directory record Official record
Conditions
Cytomegalovirus Retinitis, HIV Infections
Interventions
Ganciclovir
Drug
Lead sponsor
Roche Global Development
Other
Eligibility
3 Months to 12 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
8
States / cities
Birmingham, Alabama • Los Angeles, California • Chicago, Illinois + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 21, 2026, 1:31 PM EDT
Terminated Phase 3 Interventional

ALD-101 Adjuvant Therapy of Unrelated Umbilical Cord Blood Transfusion (UCBT) in Patients With Inherited Metabolic Diseases

NCT00654433
View directory record Official record
Conditions
Inherited Metabolic Diseases, Lysosomal Storage Disorders, Peroxisomal Storage Diseases, Inborn Errors of Metabolism, Mucopolysaccharidosis
Interventions
ALD-101
Biological
Lead sponsor
Aldagen
Industry
Eligibility
Up to 16 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
3
States / cities
Los Angeles, California • New York, New York • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 7, 2014 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

TDSM- Testosterone Dose Response in Surgically Menopausal Women

NCT00494208
View directory record Official record
Conditions
Hysterectomy, Ovariectomy, Menopause, Testosterone Deficiency
Interventions
Testosterone
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
21 Years to 60 Years · Female only
Enrollment
270 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 30, 2013 · Synced Jul 21, 2026, 1:31 PM EDT
Completed No phase listed Observational

Hereditary Colorectal and Associated Tumor Registry Study

NCT00633607
View directory record Official record
Conditions
Lynch Syndrome, FAP, Hereditary Diffuse Gastric Cancer, Juvenile Polyposis Syndrome, Peutz-Jeghers Syndrome
Interventions
Research Registry
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
8 Years to 100 Years
Enrollment
114 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 18, 2018 · Synced Jul 21, 2026, 1:31 PM EDT
Terminated No phase listed Observational

Asthma, Missed Immunizations, and Vitamin D Deficiency in Atopic Dermatitis

NCT01234909
View directory record Official record
Conditions
Atopic Dermatitis, Vitamin D Deficiency, Asthma
Interventions
Not listed
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
1 Year to 18 Years
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 31, 2015 · Synced Jul 21, 2026, 1:31 PM EDT
Enrolling by invitation Phase 2 Interventional

Sirolimus for Leigh Syndrome

NCT06843811
View directory record Official record
Conditions
Leigh Syndrome
Interventions
Sirolimus
Drug
Lead sponsor
Matthew Demczko
Other
Eligibility
6 Months to 55 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 30, 2026 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Phase 2 Interventional Results available

Effectiveness of Growth Hormone Releasing Hormone in Reducing Abdominal Fat in People Who Are Obese

NCT00675506
View directory record Official record
Conditions
Abdominal Obesity, Growth Hormone Deficiency
Interventions
Growth hormone releasing hormone (GHRH) 1-44, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 12, 2017 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Phase 4 Interventional Results available

Ketone Monitoring in T1D: Effect of SGLT2i During Usual Care and With Insulin Deficiency

NCT05541484
View directory record Official record
Conditions
Diabetes Mellitus, Type 1
Interventions
SGLT2 inhibitor, Biosense Breath Ketone Analyzer
Drug · Device
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 75 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Jul 21, 2026, 1:31 PM EDT
Completed No phase listed Observational

Low Dose Vitamin C in Burns >20% Compared to Previous Studies With High Dose Vitamin C

NCT05612867
View directory record Official record
Conditions
Burns, Ascorbic Acid Deficiency, Burn Shock, Burn Degree Second, Burn Degree Third, Fluid and Electrolyte Imbalance
Interventions
Vitamin C
Dietary Supplement
Lead sponsor
Arrowhead Regional Medical Center
Other
Eligibility
Not listed
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Colton, California
Source: ClinicalTrials.gov public record
Updated Nov 9, 2022 · Synced Jul 21, 2026, 1:31 PM EDT
Active, not recruiting Phase 3 Interventional

Clinical Study of DTX301 AAV-Mediated Gene Transfer for Ornithine Transcarbamylase (OTC) Deficiency

NCT05345171
View directory record Official record
Conditions
OTC Deficiency
Interventions
DTX301, Placebo, Oral Corticosteroids, Placebo for oral corticosteroids, Sodium Acetate
Genetic · Other · Drug
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
12 Years and older
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2031
U.S. locations
4
States / cities
Los Angeles, California • Aurora, Colorado • Chicago, Illinois + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Phase 2 Interventional Results available

A Phase 2, Pharmacokinetic (PK) Study of 6R-BH4 Alone or 6R-BH4 With Vitamin C in Subjects With Endothelial Dysfunction

NCT00532844
View directory record Official record
Conditions
Endothelial Dysfunction
Interventions
Sapropterin Dihydrochloride, Sapropterin Dihydrochloride and Vitamin C
Drug
Lead sponsor
BioMarin Pharmaceutical
Industry
Eligibility
18 Years to 75 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Hackensack, New Jersey
Source: ClinicalTrials.gov public record
Updated May 16, 2021 · Synced Jul 21, 2026, 1:31 PM EDT
Completed Not applicable Interventional

Vitamin D and Microbiota in Cystic Fibrosis

NCT02589444
View directory record Official record
Conditions
Vitamin D Deficiency, Cystic Fibrosis
Interventions
High-Dose Vitamin D3, Stool Sample, Sputum Sample, Sham Comparator, Blood draw
Dietary Supplement · Other · Procedure
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 13, 2017 · Synced Jul 21, 2026, 1:31 PM EDT
Completed No phase listed Observational

Renal Osteodystrophy: A Fresh Approach

NCT00859612
View directory record Official record
Conditions
Renal Osteodystrophy
Interventions
Not listed
Lead sponsor
Hartmut Malluche, MD
Other
Eligibility
18 Years and older
Enrollment
464 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated May 4, 2017 · Synced Jul 21, 2026, 1:31 PM EDT
Completed No phase listed Observational

Laparoscopic Revision From Biliopancreatic Diversion to Gastric Bypass

NCT01041456
View directory record Official record
Conditions
Metabolic and Nutritional Complications, Protein Malnutrition, Intestinal Malabsorptive Syndrome, Metabolic Bone Disease
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Dec 31, 2009 · Synced Jul 21, 2026, 1:31 PM EDT